ANYONE GOOD AT ALGEBRA? please help :)

linsey0689
linsey0689 Posts: 753 Member
in Chit-Chat
s=(r((6+i)^n-6))/i

I need to solve for r

s=r(6+i)^n-6) then that all over "i" as a fraction

please help me understand how to do this. ty so much :)
«1

Replies

  • endoftheside
    endoftheside Posts: 568 Member
    si=r(6+i)^n -6
    si+6 = r(6+i)^n
    (si+6)/((6+i)^n) = r

    Since there is only one r, you need to separate all the other stuff from around the r, paying attention to order of operations to keep the right things together.

    First multiply both sides by i, cancelling out the i on the right side. Then add 6 to both sides, cancelling out the 6 on the right side. Then multiply by 1/(6+i)^n on both sides, cancelling it out on the right side and leaving only r.
  • hzliiz
    hzliiz Posts: 166 Member
    My brain just cramped up reading that. :ohwell:
  • asia_hanebach
    asia_hanebach Posts: 275 Member
    si=r(6+i)^n -6
    si+6 = r(6+i)^n
    (si+6)/((6+i)^n) = r

    Since there is only one r, you need to separate all the other stuff from around the r, paying attention to order of operations to keep the right things together.

    First multiply both sides by i, cancelling out the i on the right side. Then add 6 to both sides, cancelling out the 6 on the right side. Then multiply by 1/(6+i)^n on both sides, cancelling it out on the right side and leaving only r.

    Looks good to me!
  • Monkey_Business
    Monkey_Business Posts: 1,800 Member
    Wow,
    I thought I was getting old! I actually understood that :-)
  • silvergurl518
    silvergurl518 Posts: 4,123 Member
    2x2 = 4
    1x0 = 0
    u + me = us (calculus)
  • Warchortle
    Warchortle Posts: 2,197 Member
    Yahoo answers is not MFP.
  • jjinteso
    jjinteso Posts: 2,060 Member
    The first answer was absloluely correct. That was an easy one. Have anything harder?
  • debbash68
    debbash68 Posts: 981 Member
    si=r(6+i)^n -6
    si+6 = r(6+i)^n
    (si+6)/((6+i)^n) = r

    Since there is only one r, you need to separate all the other stuff from around the r, paying attention to order of operations to keep the right things together.

    First multiply both sides by i, cancelling out the i on the right side. Then add 6 to both sides, cancelling out the 6 on the right side. Then multiply by 1/(6+i)^n on both sides, cancelling it out on the right side and leaving only r.
    Awwww just what I was going to say......probs
  • Unknown
    Unknown
    This content has been removed.
  • Warchortle
    Warchortle Posts: 2,197 Member
    Also, if someone failed to mention remember that i = sqr -1

    Depends on the teacher, but some may want you to give the answer in rational form.
  • Chief_Rocka
    Chief_Rocka Posts: 4,710 Member
    Do your own homework
  • InForBacon
    InForBacon Posts: 1,508 Member
    2x2 = 4
    1x0 = 0
    u + me = us (calculus)


    2gether_zps5e035596.jpg
  • LassoOfTruth
    LassoOfTruth Posts: 735 Member
    WOW, I feel stupid now.
  • sherrirb
    sherrirb Posts: 1,649 Member
    1340050882014_3068657.png

    findx1.png

    ^^ This is so me!
  • LassoOfTruth
    LassoOfTruth Posts: 735 Member
    1340050882014_3068657.png

    findx1.png

    False, aliens DO wear hats. Irrational... and more math words. Lolz.
  • jjinteso
    jjinteso Posts: 2,060 Member
    1340050882014_3068657.png

    findx1.png

    x= 5
  • Unknown
    Unknown
    This content has been removed.
  • _DreDay_
    _DreDay_ Posts: 40
    1340050882014_3068657.png

    findx1.png

    ^^Yes. :wink:
  • Angie80281
    Angie80281 Posts: 444 Member
    si=r(6+i)^n -6
    si+6 = r(6+i)^n
    (si+6)/((6+i)^n) = r

    Since there is only one r, you need to separate all the other stuff from around the r, paying attention to order of operations to keep the right things together.

    First multiply both sides by i, cancelling out the i on the right side. Then add 6 to both sides, cancelling out the 6 on the right side. Then multiply by 1/(6+i)^n on both sides, cancelling it out on the right side and leaving only r.

    I think it may be more complicated on that, depending on how the problem is supposed to read. OP originally posted

    s=(r((6+i)^n-6))/i

    followed by

    s=r(6+i)^n-6) then that all over "i" as a fraction

    In the second version, there is one too many ")". In the first, if accurate, the entire ((6+i)^n-6) would be multiplied by "r", preventing you from simply adding 6 to both sides of the equation.

    If I'm incorrect, please let me know. I'm blonde and it's still early.

    ETA: If it IS supposed to be written the way you interpretted it, I agree with your math completely.
  • faster_than_flash
    faster_than_flash Posts: 114 Member
    First answer is correct.

    Grab a ti-89 calculator - It can solve and check this for you.

    Also look at wolframalpha.com.
  • The_Enginerd
    The_Enginerd Posts: 3,982 Member
    I'm good at math, but I prefer to give lessons in biology as payment beforehand.
  • Warchortle
    Warchortle Posts: 2,197 Member
    si=r(6+i)^n -6
    si+6 = r(6+i)^n
    (si+6)/((6+i)^n) = r

    Since there is only one r, you need to separate all the other stuff from around the r, paying attention to order of operations to keep the right things together.

    First multiply both sides by i, cancelling out the i on the right side. Then add 6 to both sides, cancelling out the 6 on the right side. Then multiply by 1/(6+i)^n on both sides, cancelling it out on the right side and leaving only r.

    I think it may be more complicated on that, depending on how the problem is supposed to read. OP originally posted

    s=(r((6+i)^n-6))/i

    followed by

    s=r(6+i)^n-6) then that all over "i" as a fraction

    In the second version, there is one too many ")". In the first, if accurate, the entire ((6+i)^n-6) would be multiplied by "r", preventing you from simply adding 6 to both sides of the equation.

    If I'm incorrect, please let me know. I'm blonde and it's still early.

    ETA: If it IS supposed to be written the way you interpretted it, I agree with your math completely.
    I rather do it the easy way if you understand the problem I see... just multiply by i then exchange r and s... you don't need to go through a whole bunch of other processes if R is on the outside and you can just multiply by the reciprocals.
  • EddieHaskell97
    EddieHaskell97 Posts: 2,227 Member
    The first answer is beautifully precise and explained quite well. My compliments to the prof.
  • ldrosophila
    ldrosophila Posts: 7,512 Member
    si=r(6+i)^n -6
    si+6 = r(6+i)^n
    (si+6)/((6+i)^n) = r

    Since there is only one r, you need to separate all the other stuff from around the r, paying attention to order of operations to keep the right things together.

    First multiply both sides by i, cancelling out the i on the right side. Then add 6 to both sides, cancelling out the 6 on the right side. Then multiply by 1/(6+i)^n on both sides, cancelling it out on the right side and leaving only r.

    I think it may be more complicated on that, depending on how the problem is supposed to read. OP originally posted

    s=(r((6+i)^n-6))/i

    followed by

    s=r(6+i)^n-6) then that all over "i" as a fraction

    In the second version, there is one too many ")". In the first, if accurate, the entire ((6+i)^n-6) would be multiplied by "r", preventing you from simply adding 6 to both sides of the equation.

    If I'm incorrect, please let me know. I'm blonde and it's still early.

    ETA: If it IS supposed to be written the way you interpretted it, I agree with your math completely.

    That's what got me stuck because I kept trying to multiply the R, and started to FOIL the 6+i till I realized the exponent was N!
  • Angie80281
    Angie80281 Posts: 444 Member
    si=r(6+i)^n -6
    si+6 = r(6+i)^n
    (si+6)/((6+i)^n) = r

    Since there is only one r, you need to separate all the other stuff from around the r, paying attention to order of operations to keep the right things together.

    First multiply both sides by i, cancelling out the i on the right side. Then add 6 to both sides, cancelling out the 6 on the right side. Then multiply by 1/(6+i)^n on both sides, cancelling it out on the right side and leaving only r.

    I think it may be more complicated on that, depending on how the problem is supposed to read. OP originally posted

    s=(r((6+i)^n-6))/i

    followed by

    s=r(6+i)^n-6) then that all over "i" as a fraction

    In the second version, there is one too many ")". In the first, if accurate, the entire ((6+i)^n-6) would be multiplied by "r", preventing you from simply adding 6 to both sides of the equation.

    If I'm incorrect, please let me know. I'm blonde and it's still early.

    ETA: If it IS supposed to be written the way you interpretted it, I agree with your math completely.

    That's what got me stuck because I kept trying to multiply the R, and started to FOIL the 6+i till I realized the exponent was N!

    I did the same thing at first. If the way she wrote it is correct, it should be r = (si)/((6+i)^n -6)
  • gzus7freek
    gzus7freek Posts: 494 Member
    R = Pie?

    2R7CAJ0K598THG5MO1OJ7MZCIV4JZ.png
  • linsey0689
    linsey0689 Posts: 753 Member
    si=r(6+i)^n -6
    si+6 = r(6+i)^n
    (si+6)/((6+i)^n) = r

    Since there is only one r, you need to separate all the other stuff from around the r, paying attention to order of operations to keep the right things together.

    First multiply both sides by i, cancelling out the i on the right side. Then add 6 to both sides, cancelling out the 6 on the right side. Then multiply by 1/(6+i)^n on both sides, cancelling it out on the right side and leaving only r.

    thank you!
  • AliciaStinger
    AliciaStinger Posts: 402 Member
    Apparently I'm not. I tried to solve the problem to see if I'm even qualified to give you instructions.............NOPE. Good luck.
  • CookNLift
    CookNLift Posts: 3,660 Member
    http://www.wolframalpha.com/input/?i=s=(r((6+i)^n-6))/i+solve+for+r
  • linsey0689
    linsey0689 Posts: 753 Member
    i would like to thank everyone who tried and help me very nice of you. i knew i would get some negative comments but that's okay i understand that's not what this site is made for but almost everyone on here is so nice that's why i decided to ask.


    thanks again everyone :)

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